Screw and/or screw-and-glue and/or screw-and-glue-and-insulate. When I say insulate, depending on what you're installing, you may want sound-absorbing mounting 'blocks'. And depending on the span, it's worth looking into lolly columns and steel I-beam(s).
Enjoy your new home! My best to ya and hope this helps.
Jay J -Moderator
PS: Do talk to your builder for specific recommendations. Your Architect (or an Architect) may be of assistance.